Demi Lovato and Wilmer Valderrama Split; Mom Enters Rehab

Demi Lovato, who revealed a few months ago that she's bipolar, has been through a lot in her life, and all in the public eye. Unfortunately, Lovato's load just got a bit heavier -- not only have she and Wilmer Valderrama called it quits, but her mom, Dianna Hart de la Garza, is entering rehab as well.

"It has been a tough year for Demi, and her mom has been a constant source of support. But fame has also taken its toll on her family," a source close to the family tells the New York Post. Just last fall, Lovato spent time in rehab to get treatment for emotional and physical problems, and during that time, her mother was her person to lean on. The source adds, "Now [that] Demi is strong again, her mom could take some time to deal with her own issues."

Last month, Lovato's mother pledged to help her stay strong by getting a tattoo that matches her daughter's, which says just that, "Stay Strong." At the time, the 18-year-old singer tweeted, "My mom surprised me with it when I was in treatment because that’s how all you guys were showing support … And she wanted to show me how … Proud she was of me for getting help and changing my life … I love her so much."

Now Lovato's mom has checked into rehab, we hope she's able to gain strength from that daily reminder, as well.

As for Lovato's late relationship with 'That '70s Show' famer Valderrama, it was (inevitably) their vast age difference that pulled them apart. "The age difference meant they were in completely different places in their lives," a source comments. Though, Lovato's reps refused to comment, making it clear that they don't meddle in her personal life.